/**
 * This is a env module
 */

/**
 * Get environment variable according to the key
 * @param key the name of environment variable
 * @return environment variable
 */
static function getEnv(key: string): string;

/**
 * Get environment variable according to the key
 * @param key the name of environment variable
 * @param value the value of environment variable
 * @return void
 */
static function setEnv(key: string, value: string) throws: void;